/*--------------------------------------------------------------------------
 *  Copyright 2008 utgenome.org
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *--------------------------------------------------------------------------*/
//--------------------------------------
// utgb-shell Project
//
// Server.java
// Since: Jan 10, 2008
//
// $URL$ 
// $Author$
//--------------------------------------
package org.utgenome.shell;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.utgenome.config.UTGBConfig;
import org.xerial.util.log.Logger;

/**
 * A UTGB sub command for starting up a UTGB portable server
 * 
 * @author leo
 * 
 */
public class Server extends UTGBShellCommand {

	private static Logger _logger = Logger.getLogger(Server.class);

	private UTGBPortableConfig option = new UTGBPortableConfig();

	public Server() {

	}

	@Override
	public void execute(String[] args) throws Exception {

		if (!isInProjectRoot())
			throw new UTGBShellException("not in the track project root");

		// copy resources
		Maven.runMaven("war:exploded");

		UTGBConfig config = loadUTGBConfig();
		String projectName = config.projectName;
		if (option.contextPath == null)
			option.contextPath = "/" + (projectName != null ? projectName : "utgb");

		// create context.xml
		option.projectRoot = new File(globalOption.projectDir == null ? "" : globalOption.projectDir).getAbsolutePath();
		createContextXML(projectName, option.projectRoot, true);

		if (_logger.isDebugEnabled())
			_logger.debug(option);

		UTGBPortable server = new UTGBPortable(option);
		server.addServerListener(new ServerListener() {
			public void beforeStart() {
				try {
					_logger.info("synchronizing the folder contents from " + option.webAppDir + " to " + option.workingDir);

					rsync(getProjectResourcePath(option.webAppDir).getAbsolutePath(), getProjectResourcePath(option.workingDir).getAbsolutePath());
				}
				catch (Exception e) {
					_logger.error(e);
				}

			}

			public void afterStart() {
				_logger.info("started the server");
			}

			public void afterStop() {
				_logger.info("stopped the server");
			}

			public void beforeStop() {
				_logger.info("stopping the server");
			}
		});
		server.start();

	}

	public static void rsync(File src, File dest) throws UTGBShellException, IOException {
		if (!src.exists())
			return;

		if (src.isDirectory()) {

			String dirName = src.getName();
			// ignore .svn, .cvs folders
			if (dirName.endsWith(".svn") || dirName.endsWith(".cvs"))
				return;

			// prepare the target directory
			if (dest.exists()) {
				if (!dest.isDirectory())
					throw new UTGBShellException("cannot create a directory " + getPath(dest) + ": a file with the same name already exists.");
			}
			else {
				_logger.info("create a directory: " + getPath(dest));
				dest.mkdirs();
			}

			// copy contents under the direcotry
			for (File childFile : src.listFiles()) {
				rsync(childFile, new File(dest, childFile.getName()));
			}
		}
		else {
			// copy the src file
			boolean toOverwrite = dest.exists() ? src.lastModified() > dest.lastModified() : true;
			if (!toOverwrite)
				return;

			// prepare the parent folder
			File parentFolder = dest.getParentFile();
			if (!parentFolder.exists()) {
				_logger.info("create a directory: " + getPath(parentFolder));
				parentFolder.mkdirs();
			}
			_logger.info("create a file: " + getPath(dest));
			BufferedInputStream in = new BufferedInputStream(new FileInputStream(src));
			FileOutputStream out = new FileOutputStream(dest);
			byte[] buffer = new byte[1024];
			int bytesRead = 0;
			while ((bytesRead = in.read(buffer)) > 0) {
				out.write(buffer, 0, bytesRead);
			}
			out.flush();
			out.close();
		}

	}

	public static void rsync(String src, String dest) throws UTGBShellException, IOException {
		rsync(new File(src), new File(dest));
	}

	@Override
	public String name() {
		return "server";
	}

	public String getOneLinerDescription() {
		return "start up the portable web server";
	}

	@Override
	public Object getOptionHolder() {
		return option;
	}

}